EFFECTIVENESS OF DONJOY ® OA BRACES
Increased joint space
MALALIGNMENT
ABERRANT BIOMECHANICS
INCREASED BODY WEIGHT
MUSCLE WEAKNESS
INCREASED COMPARTMENT LOADING
DECREASED ACTIVITY
DECREASED STABILITY
DECREASED CONFIDENCE
PAIN
• DonJoy OA Defiance ® brace can induce a significant increase (0.3 mm) in medial compartment dynamic joint space during gait in medial compartment knee OA patients 32 . This corresponds to roughly 10% increase in joint space during the impact phase of gait. • The study measured the dynamic joint space in the medial compartment continuously over the stance phase of the gait using highly accurate biplane radiography system with three-dimensional sub-millimeter accuracy. The increase of medial compartment joint space when wearing the brace was consistent from heel strike to terminal stance in this study. (fig. 4)
More red means narrower joint space
More green means increased joint space
Joint space color coding
Fig 4: The instantaneous dynamic joint space during gait at 15% of the gait cycle for one subject. Subchondral bone surfaces are color coded according to minimum distance from the opposing bone surface. The figure demonstrates increased medial compartment joint space in the braced condition (red color disappeared, yellow surface decreased, green surface increased) 32 .
Increased dynamic joint space during gait with DonJoy ® braces offloads the OA compartment 32
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